| PDTC | poorly differentiated thyroid carcinoma |
| FNAC | fine-needle aspiration cytology |
| RAI | radioiodine |
| EBRT | external-beam radiotherapy |
| ATC | anaplastic thyroid carcinoma |
| SVC | superior vena cava |
| TSH | thyroid-stimulating hormone |
| PDTC | poorly differentiated thyroid carcinoma |
| FNAC | fine-needle aspiration cytology |
| RAI | radioiodine |
| EBRT | external-beam radiotherapy |
| ATC | anaplastic thyroid carcinoma |
| SVC | superior vena cava |
| TSH | thyroid-stimulating hormone |